METHOD FOR CREATING EXCESS PRESSURE IN THE UNDER-MASK SPACE Russian patent published in 2023 - IPC A62B7/00 

FIELD: protection clothing.

SUBSTANCE: method for creating excess pressure in the under-mask space is claimed, consisting in the action of air under excess pressure, depending on the height, on the exhalation support valve of oxygen mask, and the action is carried out by creating absolute air pressure through the additional introduction of a retaining tank into the support line to be able to hold the expanding air as the height increases and creating excess pressure in the under-mask space of the oxygen mask, which provides oxygen supply to the operator at altitudes up to 15,000 m or higher.

EFFECT: expansion of the range of solutions for pressure maintenance in the under-mask space.

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